Device for releasing combing-wheels in sheet-feeders.



G. SPIESS. DEVICE FOR RELEASING GOMBING WHEELS IN SHEET PEEDERS.

APPLICATION FILED FEB-2 6, 1912.

Patented Feb. 24, 191;

GEORG SPIESS, OF LEIPZIG-REUDNITZ, GERMANY.

DEVICE FOR RELEASING COMBING-WHEELS IN SHEET-FEEDERS.

Specification of Letters Patent.

Patented Feb. 2 f, 19 14:.

Application filed February 26, 1912. Serial No. 679,930.

To all whom it may concern:

Be it known that I, Guess Srrnss, a citizen of the Empire of Germany, and a resident of Leipzig-Reudnitz, Germany, have invented certain new and useful Improvements in Devices for Releasing Combing- Wheels in Sheet-Feeders, of which the fol lowing is a specification.

This invention has reference to a novel device for releasing the combing wheels in sheet feeders.

In sheet feeding devices which take off single sheets from a pile by means of combing wheels, it is essential that the passing of the sheet edges into the transport rollers take place in straight lines. This has been effected in these devices by the edge of a sheet which releases a trip finger whereby the combing wheels are momentarily stopped and the feeding of the sheets interrupted on this side. In order to be able to utilize the slight movement of the trip finger for effecting the release of the combing wheel, the trip finger is so arranged that it engages a continuously moving member, which in turn causes the movement for releasing the combing wheel. This arrangement has the deficiency that the entire pressure of the release mechanism is transmitted to the trip finger device.

According to the present invention these deficiencies are avoided by mounting the trip finger so that it swings and by its movement is brought into direct or indirect engagement with a loose part of a continuously rotating coupling. By checking this loose part, the coupling is shifted, whereby the device for releasing the combing wheel is put into effect.

The present invention is illustrated in the accompanying drawing, in which:

Figure 1 represents in front elevation a device for releasing the combing wheel in sheet feeders which embodies in desirable form the present improvements; Fig. 9. shows same in side elevation; and Fig. 3 is a front elevation of a modified form of the device.

Similar characters of reference denote like parts in all the figures.

In the device illustrated only the necessary parts of the release mechanism are shown. The release lever A rests with its free end portion upon the top end of the bar B. A suitably supported spring G in connection with said bar normally tends to draw same in an upward direction. In this position the release lever A acts on the mechanism for making the combing wheels effect1ve by means of the arms 1), E. The casing of the combing wheels is secured on the shaft F. The trip finger G is movably mounted at the lower end of the bar B. The trip finger forms at its top end a hook 1-1 which engages the adjoining end pon tion of a locking lover I, when said trip finger is actuated by the edge of the passing sheet of paper. This causes a movement of the locking lever I. The hook K on the end portion of said locking lever then engages the toothed portion of the coupling disk L, which is loosely rotatable, but can not be shifted upon the shaft M. A coupling member N is securely mounted on said shaft M but so that it may be axially shifted thereon. The coupling member N rotates continuously. Both coupling members are in engagement with each other by means of the teeth 0 which also form lock teeth. lVhen the loose coupling disk L is prevented from moving by the hook K of the locking lever I, as shown in Fig. 1, then the coupling member N is axially shifted upon further rotation of the shaft M. At the end of the coupling member N there is a slanting surface P. By virtue of this slanting surface the coupling member N shifts the release mechanism by actuating the release arm Q. By this movement the locking hook H of the trip finger G is caused to move whereby the bar B is set free and raised by the spring 0. The bar B then raises the release lever A which rests on its top surface. The lever A then actuates the arm D effecting thus the release of the combing wheel. When the bar B rises, the trip finger G is also raised because it is pivotally mounted thereon. When the trip finger is raised, the further transportation of the sheet of paper takes lace.

The bar B may be checked against the action of its spring C in any desired manner. This is effected in the device illustrated by guiding the bar between the pins S and T of the locking arm B so that the circle described by these pins cuts the straight way of the bar, whereby saic bar normally is held tightly and kept down counteracting the spring C. However, when but a slight movement of the lever occurs, the clamping of the bar is released and said bar is set free. The movement of the release arm Q, shifts the locking arm R in an upward direction by pressing against the inner short end of said arm.

In the modified form illustrated in Fig. 3 of the drawing, the bar B is checked by a swing-arm U, which engages with a hooked end portion a corresponding incision of said bar B. The trip finger G is linked to the swing-arm U with its hooked top end portion and engages the teeth of the loose coupling directly when it is actuated by a moving sheet of paper. By the shifting of the constantly rotating coupling member N the arm U is caused to move. This is effected for instance when the slanting surface of the coupling presses against the extension V of the arm U.

The return of the described parts of the release mechanism may be efiected in various manners. This, however, is of no importance for the present invention. The shifting of the coupling member may also be effected in any other than the axial direction when other well known coupling means are employed.

I claim as my invention 1. Device for releasing the combing wheels in sheet feeders, comprising a vertically movable bar with spring tending to draw it normally upward, means for keeping said bar normally in its lower position, a swinging trip finger pivotally secured to the lower end of said bar and actuated by the passing sheet, a coupling consisting of a loosely rotatable disk and a continuously rotating coupling member adapted to be axially shifted and having a slanting contact surface, said trip finger checking by its movement the loosely rotatable disk causing the shifting of the continuously rotating member, and release mechanism for the combing wheels comprising a release arm actuated by the slanting surface of said shifting coupling member, thereby operating said release mechanism.

2. Device for releasing the combing wheels in sheet feeders, comprising a vertically movable bar, with spring tending to draw it normally upward, means for keeping said bar normally in its lower position, a swinging trip finger pivotally secured to the bottom end portion of said bar, a top hook on said trip finger, a coupling adjoined thereto consisting of a loosely rotatable disk with toothed section and a continuously rotating coupling member adapted to be axially lease mechanism.

3. Device for releasing the combing wheels in sleet feeders, comprising a vertically movable bar with spring tending to draw it normally upward, means for keeping said bar normally in its lower position, a swinging trip finger with top hook pivotally secured to the lower portion of said bar, a coupling consisting of a loosely rotatable disk with toothed section and a continuously'rotating coupling member adapted to be axially shifted and having a slanting surface on its outer end portion, a release arm actuated by the slanting surface, and release mechanism operated by said release arm.

t. Device for releasing the combing wheels in sheet feeders, comprising a vertically movable bar, a locking bar normally keeping said vertical bar in its lower position, a trip finger mounted on the bottom portion of said vertical bar, a coupling engaging said trip finger and adapted to be axially-shifted, a slanting contact surface on said coupling, a release arm actuated by the slanting surface of the coupling adapted to shift the locking arm in an upward direction whereby the vertical bar is allowed to move upward, and release mechanism actuated thereby.

5. In a device for releasing the combing wheels in sheet feeders, a vertically movable bar, a trip finger pivotally secured to the lower end portion of same and actuated by the passing sheet, release mechanism for the combing wheels actuated by the vertically movable bar, and a locking lever arrangementcomprising a bar with two pins adapted to clamp the vertical bar and normally keep same in its lower position, and means for releasing said locking bar and pins from the vertical bar.

Signed at Leipzig, Germany, this 9th day of February 1912.

GEORG SPIESS.

Witnesses EDMUND SCI-IROEDER, RUDOLPH FRIOKE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

